Pelorus-class cruiser

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HMS Pyramus in 1914
Class overview
Name	Pelorus
Operators	Royal Navy
Preceded by	Arrogant class
Succeeded by	Highflyer class
Built	1896–1899
In commission	1899–1922
Completed	11
Lost	1
Scrapped	10
General characteristics
Type	Protected cruiser
Displacement	2,135 long tons (2,169 t)
Length	300 ft (91.4 m) (p/p, 313 ft 6 in (95.6 m) (o/a)
Beam	36 ft 6 in (11.1 m)
Draught	17 ft (5.2 m)
Installed power	7,000 ihp (5,200 kW)
Propulsion	2 shafts, Vertical triple-expansion steam engines 16 water-tube boilers
Speed	20 knots (37 km/h; 23 mph)
Complement	224
Armament	8 × QF 4-inch (102 mm) guns 8 × 3-pounder (47 mm) quick firing guns 2 × 18 inch (450 mm) torpedo tubes
Armour	Deck: 1.5–2 in (38–51 mm) Conning tower: 3 in (76 mm)

The Pelorus-class cruiser was a "third-class" protected cruiser designed by Sir William White (Director of Naval Construction 1885 – 1902) for the Royal Navy, based on the earlier Pearl-class cruisers. Eleven ships were ordered to this design in 1893 under the Spencer Programme, and were laid down 1896–1900. The first, HMS Pelorus, was commissioned in 1896.